3994871 has 4 divisors (see below), whose sum is σ = 3999000. Its totient is φ = 3990744.

The previous prime is 3994849. The next prime is 3994891. The reversal of 3994871 is 1784993.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3994871 - 2¹⁸ = 3732727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3994841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260 + ... + 2838.

It is an arithmetic number, because the mean of its divisors is an integer number (999750).

Almost surely, 2^3994871 is an apocalyptic number.

3994871 is a deficient number, since it is larger than the sum of its proper divisors (4129).

3994871 is a wasteful number, since it uses less digits than its factorization.

3994871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128.

The product of its digits is 54432, while the sum is 41.

The square root of 3994871 is about 1998.7173386950. The cubic root of 3994871 is about 158.6722280101.

The spelling of 3994871 in words is "three million, nine hundred ninety-four thousand, eight hundred seventy-one".